"Much," he replies, grinning terribly when she gasps, when the position shifts, and jerks his hips while he's got her gaze caught. "Vibration travels better."

He illustrates this with the vibration of other organic matter. Of course, 'vibration' is defined very, very loosely here.

"Since it's mostly wood, it doesn't even use up that much power itself - that much vibration, it powers itself just 'cause it's on."